OT:Julius Caesar is credited with inventing leap year in 45 B.C., with improvements added by Pope Gregory XIII in A.D. 1582. By my count, that means that humans have had more than 2000 years to get used to the idea, and more than 30 years to figure out how to account for leap years in computer code. That raises a reasonable question: Why on earth did Exchange Server 2007 administrators have a leap year problem on February 29 of this year?